Pro Micro & Fio V3 Hookup Guide - SparkFun LearnHeads up! This is for the Pro Micro (ATmega32U4) 5V and 3.3V versions. If you are looking for information about hardware on the Qwiic Pro Micro with the USB-C connector, make sure to check out the newer Qwiic Pro Micro USB-C (ATmega32U4) Hookup Guide. Welcome to the new frontier of Arduino-compatible boards, made possible by the ATmega32U4. No longer does your Arduino need to be harnessed by an FT
Heartbeat Straight Jacket - SparkFun Learn
